Patents by Inventor Mayumi Yokoi

Mayumi Yokoi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 11066343
    Abstract: Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.
    Type: Grant
    Filed: November 16, 2017
    Date of Patent: July 20, 2021
    Assignee: ENEOS CORPORATION
    Inventors: Yasuhiro Araki, Mayumi Yokoi, Ryoji Ida, Atsushi Segawa, Masanari Akiyama
  • Publication number: 20210009488
    Abstract: A method for producing p-xylene, comprising: a dimerization step of bringing a first raw material comprising isobutene into contact with a dimerization catalyst to generate C8 components comprising diisobutylene; a cyclization step of bringing a second raw material comprising the C8 components into contact with a dehydrogenation catalyst comprising Pt in the presence of hydrogen to obtain a reaction product comprising p-xylene; and a collection step of collecting p-xylene from the reaction product.
    Type: Application
    Filed: March 19, 2019
    Publication date: January 14, 2021
    Applicant: ENEOS Corporation
    Inventors: Ai MINODA, Masanari AKIYAMA, Yasuhiro ARAKI, Masakazu IKEDA, Mayumi YOKOI
  • Publication number: 20190263731
    Abstract: Provided is a method for producing p-xylene, comprising: a provision step of providing a C4 fraction comprising at least isobutene as a product formed by fluidized catalytic cracking of a heavy oil fraction; a dimerization step of bringing a first raw material comprising the isobutene into contact with a dimerization catalyst to produce a C8 component comprising a dimer of isobutene; and a cyclization step of bringing a second raw material comprising the C8 component with a dehydrogenation catalyst to produce p-xylene through a cyclization/dehydrogenation reaction of the C8 component.
    Type: Application
    Filed: November 16, 2017
    Publication date: August 29, 2019
    Applicant: JXTG Nippon Oil & Energy Corporation
    Inventors: Yasuhiro ARAKI, Mayumi YOKOI, Ryoji IDA, Atsushi SEGAWA, Masanari AKIYAMA
  • Patent number: 9988585
    Abstract: A method for producing a base oil for lubricant oils comprising: a first step of hydrocracking a stock oil having a content percentage of a heavy matter of 80% by mass or more so that a crack per mass of the heavy matter is 20 to 85% by mass, to obtain a hydrocracked oil comprising the heavy matter and a hydrocracked product thereof, a second step of fractionating the hydrocracked oil into a base oil fraction comprising the hydrocracked product and a heavy fraction comprising the heavy matter and being heavier than the base oil fraction, respectively, a third step of isomerization dewaxing the base oil fraction from the fractionation in the second step to obtain a dewaxed oil, wherein the heavy fraction from the fractionation in the second step is returned to the first step as a part of the stock oil.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: June 5, 2018
    Assignee: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Kazuaki Hayasaka, Yoshiyuki Nagayasu, Marie Iwama, Mayumi Yokoi, Tomohisa Hirano
  • Patent number: 9840672
    Abstract: A method for producing a hydroisomerization catalyst includes a first step of preparing a support precursor by heating a mixture containing an ion-exchanged zeolite and a binder, the ion-exchanged zeolite being prepared by ion-exchanging an organic template-containing zeolite which contains an organic template and has a one-dimensional pore structure including a 10-membered ring in a solution containing ammonium ions and/or protons, at a temperature of 250 to 350° C. under N2 atmosphere, and a second step of preparing a hydroisomerization catalyst, which is prepared by calcining a catalyst precursor, the catalyst precursor being prepared based on the support precursor containing a platinum salt and/or a palladium salt, at a temperature of 350 to 400° C. in an atmosphere containing molecular oxygen, the hydroisomerization catalyst containing a support which includes a zeolite and carries platinum and/or palladium.
    Type: Grant
    Filed: March 29, 2013
    Date of Patent: December 12, 2017
    Assignee: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Yoshiyuki Nagayasu, Kazuaki Hayasaka, Mayumi Yokoi, Koshi Takahama
  • Patent number: 9458387
    Abstract: A Fischer-Tropsch synthesis reaction catalyst includes a catalyst support containing a silica and zirconium oxide in an amount of 0.5 to 14% by mass based on the mass of the catalyst support, and cobalt metal and a cobalt oxide supported on the catalyst support in an amount equivalent to 10 to 40% by mass of tricobalt tetroxide based on the mass of the catalyst, wherein the degree of reduction of the cobalt atoms is within a range from 75 to 93%, and the amount of hydrogen gas adsorption per unit mass of the catalyst at 100° C. is within a range from 0.40 to 1.0 ml/g.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: October 4, 2016
    Assignees: Japan Oil, Gas and Metals National Corporation, INPEX CORPORATION, JX Nippon Oil & Energy Corporation, Japan Petroleum Exploration Co., Ltd., COSMO OIL CO., LTD., NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.
    Inventors: Yoshiyuki Nagayasu, Hideki Ono, Kazuaki Hayasaka, Mayumi Yokoi
  • Publication number: 20150368569
    Abstract: A method for producing a base oil for lubricant oils comprising: a first step of hydrocracking a stock oil having a content percentage of a heavy matter of 80% by mass or more so that a crack per mass of the heavy matter is 20 to 85% by mass, to obtain a hydrocracked oil comprising the heavy matter and a hydrocracked product thereof, a second step of fractionating the hydrocracked oil into a base oil fraction comprising the hydrocracked product and a heavy fraction comprising the heavy matter and being heavier than the base oil fraction, respectively, a third step of isomerization dewaxing the base oil fraction from the fractionation in the second step to obtain a dewaxed oil, wherein the heavy fraction from the fractionation in the second step is returned to the first step as a part of the stock oil.
    Type: Application
    Filed: November 5, 2013
    Publication date: December 24, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Kazuaki HAYASAKA, Yoshiyuki NAGAYASU, Marie IWAMA, Mayumi YOKOI, Tomohisa HIRANO
  • Publication number: 20150057478
    Abstract: A method for producing a hydroisomerization catalyst includes a first step of preparing a support precursor by heating a mixture containing an ion-exchanged zeolite and a binder, the ion-exchanged zeolite being prepared by ion-exchanging an organic template-containing zeolite which contains an organic template and has a one-dimensional pore structure including a 10-membered ring in a solution containing ammonium ions and/or protons, at a temperature of 250 to 350° C. under N2 atmosphere, and a second step of preparing a hydroisomerization catalyst, which is prepared by calcining a catalyst precursor, the catalyst precursor being prepared based on the support precursor containing a platinum salt and/or a palladium salt, at a temperature of 350 to 400° C. in an atmosphere containing molecular oxygen, the hydroisomerization catalyst containing a support which includes a zeolite and carries platinum and/or palladium.
    Type: Application
    Filed: March 29, 2013
    Publication date: February 26, 2015
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Yoshiyuki Nagayasu, Kazuaki Hayasaka, Mayumi Yokoi, Koshi Takahama
  • Patent number: 8758596
    Abstract: A first hydroisomerization catalyst contains a support being a extruded product prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more and at least one metal supported on the support and selected from the group consisting of metals belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten, wherein the support contains (a1) a calcined zeolite prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more of an ion-exchanged zeolite obtained by ion exchange of an organic template-containing zeolite containing an organic template and having a 10-membered ring one-dimensional porous structure in a solution containing ammonium ions and/or protons, and (b1) a calcined inorganic oxide prepared by calcination having a thermal treatment that includes thermally treating at 350° C.
    Type: Grant
    Filed: December 25, 2009
    Date of Patent: June 24, 2014
    Assignee: JX Nippon Oil & Energy Corporation
    Inventors: Kazuaki Hayasaka, Motoya Okazaki, Mayumi Yokoi
  • Publication number: 20140018454
    Abstract: A Fischer-Tropsch synthesis reaction catalyst includes a catalyst support containing a silica and zirconium oxide in an amount of 0.5 to 14% by mass based on the mass of the catalyst support, and cobalt metal and a cobalt oxide supported on the catalyst support in an amount equivalent to 10 to 40% by mass of tricobalt tetroxide based on the mass of the catalyst, wherein the degree of reduction of the cobalt atoms is within a range from 75 to 93%, and the amount of hydrogen gas adsorption per unit mass of the catalyst at 100° C. is within a range from 0.40 to 1.0 ml/g.
    Type: Application
    Filed: March 14, 2012
    Publication date: January 16, 2014
    Applicants: JAPAN OIL, GAS AND METALS NATIONAL CORPORATION, INPEX CORPORATION, NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD., JAPAN PETROLEUM EXPLORATION CO., LTD., COSMO OIL CO., LTD., JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Yoshiyuki Nagayasu, Hideki Ono, Kazuaki Hayasaka, Mayumi Yokoi
  • Publication number: 20110270010
    Abstract: A first hydroisomerization catalyst contains a support being a extruded product prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more and at least one metal supported on the support and selected from the group consisting of metals belonging to Groups 8 to 10 of the periodic table, molybdenum and tungsten, wherein the support contains (a1) a calcined zeolite prepared by calcination having a thermal treatment that includes thermally treating at 350° C. or more of an ion-exchanged zeolite obtained by ion exchange of an organic template-containing zeolite containing an organic template and having a 10-membered ring one-dimensional porous structure in a solution containing ammonium ions and/or protons, and (b1) a calcined inorganic oxide prepared by calcination having a thermal treatment that includes thermally treating at 350° C.
    Type: Application
    Filed: December 25, 2009
    Publication date: November 3, 2011
    Applicant: JX NIPPON OIL & ENERGY CORPORATION
    Inventors: Kazuaki Hayasaka, Motoya Okazaki, Mayumi Yokoi